Yah, they do have utility though, they guard the contents from a higher degree of exposure to dust and kitchen exhaust grime and any splatter that should occur in the space that goes in all directions. Easier to wipe a more or less flat planar surface than the intricate surfaces possibly pervious surfaces of the contents.
Oh, I agree. My cabinets have doors, and I keep them closed. But if you’re already leaving all your cabinets open at all times, you might as well just get the doors out of your way.